Executing a script inside snap package. Is this possible?

[Eloy García (PC Actual)]

Thank you very much for your answer Michel. I hope somebody from snapd or
security team can help too :)

El 17 abr. 2017 3:07 a. m., "Michael Hall" <mhall119 at ubuntu.com> escribió:

> Running a script inside of your snap with either /bin/sh or /bin/bash
> should be no problem at all. However looking at your script I see that
> you're making dbus calls out to the Plasma Shell, and that *will* be
> blocked by the strict confinement.
>
> You will probably need to get a snapd interface created to support this
> dbus interface, or maybe you can use the generic 'dbus' interface and
> specify this service, which would have to be manuall connected. I'm
> hoping someone from the snapd or security teams can chime in and be more
> specific about what your options are here.
>
> Michael Hall
> mhall119 at ubuntu.com
>
> On 04/16/2017 05:13 PM, Eloy García (PC Actual) wrote:
> > Hello everybody.
> >
> > I develop a graphical java-based application which is published in the
> > Ubuntu Store as a snap package (sctrict confinment) called
> > wallpaperdownloader to download, manage and set desktop wallpapers.
> >
> > I'm developing version 2.7 which will bring KDE support, but for this I
> > need to execute a shell script from Java. In classic confinement and
> > natively, this script is executed without problems. I use this code to do
> > it:
> >
> > process = Runtime.getRuntime().exec("/bin/sh " +
> WDUtilities.getAppPath() +
> > WDUtilities.URL_SLASH + WDUtilities.PLASMA_SCRIPT + " " +
> wallpaperPath);
> >
> > As you can see, I use /bin/sh command to run the script. This is the
> > content of the script:
> >
> > #!/bin/bash
> >
> > # Changing wallpaper
> > qdbus org.kde.plasmashell /PlasmaShell org.kde.PlasmaShell.
> evaluateScript
> > "var allDesktops = desktops();print (allDesktops);for
> > (i=0;i<allDesktops.length;i++) {d =
> > allDesktops[i];d.wallpaperPlugin = 'org.kde.image';d.currentConfigGroup
> =
> > Array('Wallpaper', 'org.kde.image', 'General');d.writeConfig('Image',
> > 'file://"$1"')}"
> >
> > This command changes the current wallpaper for version 5.8 or higher in
> > Plasma.
> >
> > When this part is executed within the snap package (strict confinement),
> > nothing happens. I have tried to include bash and dash pacakges as
> > stage-packages but it doesn work. Is this something that can be achieved
> > using the snap package system?
> >
> > Thank you very much!
> >
> > Best,
> >
> > Eloy
> >
>
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